build: update wasi-vfs to v0.6.2 #768

Job	Run time
ci-data	4s
Push source gem	-1s
Compile native gem for aarch64-linux-musl	8m 37s
Compile native gem for x86_64-darwin	8m 20s
Compile native gem for x64-mingw-ucrt	7m 49s
Compile native gem for x86_64-linux	14m 9s
Compile native gem for arm64-darwin	8m 26s
Compile native gem for aarch64-linux	8m 25s
Compile native gem for x86_64-linux-musl	8m 43s
	1h 4m 32s

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